The follow is a list of common options across all render extensions
x - x position of the render extension relative to the control (number, optional, default: 0)
y - y position of the render extension relative to the control s(number, optional, default: 0)
width - width of therender extension, if -1 then it will set to the size of the object being rendered (number, optional, default: width of object it is attached to)
height - height of the render extension, if -1 then it will set to the size of the object being rendered (number, optional, default: height of object it is attached to)
alpha - Alpha value for this render extension (number, optional, 0-255, default: 255 (opaque))
rotation - Rotation for the item, (0-360) (number, optional, default: 0)
valign - Vertical alignment within the control (number, optional, default: 0)
0: default, top
1: top
2: center
3: bottom
halign - Horizontal alignment within the control (number, optional, default: 0)
0: default, left
1: left
2: center
3: right
A render extension can have a vertical and horizontal alignment. This alignment is based on the control area and the render extension position and size. The following describes the effects of these parameters on alignment.
Width and height set, position set to (0,0)
Width and height set, position set to (5,5). The position functions as an offset to the alignment
